°
Symbol  Format  Data 

°  Code Point  U+00B0 
TeX  \degree 

SVG 
In mathematics, the degree symbol is used to represent an angle measured in degrees. The symbol is typically used in an expression like this:
In plain language, this represents a 45degree angle. The symbol is also used in physics as a unit of temperature for Fahrenheit and celsius.
Degrees are a unit of measurement for angles, representing the rotation between two rays. The degree angle system divides a full rotation into 360 units called degrees.